Overhead Crane Anti Swing & Swing Control for
High precision, High efficiency & Smooth Operation

Anti swing cranes for high precision & efficiency. Swing control system for overhead crane, gantry crane & automatic cranes to ensures smooth operation.

Swaying loads are unquestionably a major issue for the safety and efficiency of overhead crane operations. To address this issue, an anti-swing electrical control system for overhead cranes is being developed and tested using a precise load swing movement mathematical model. This overhead crane anti-swing system can control the running speeds of the crane and trolley to reduce load swing by 95%.

Importance of anti swing control

The incorrect operation of the moving direction, rapid change of the moving direction, sudden start or stop of the overhead crane, and acceleration or deceleration during operation will cause the hoisting and spreader to swing, greatly reducing the crane's working efficiency. Reduce the swing time of the spreader and improve work efficiency are critical for lifting equipment and the material handling industry with frequent loading and unloading.

Furthermore, the swinging of heavy objects can pose a significant safety risk to the operator, the work site, and the overhead crane itself. As a result, crane manufacturers and research institutions are working hard to develop a set of anti-sway systems for industrial cranes in order to achieve stable and smooth operation. A good anti-sway system can reduce sway, increase labor productivity, and eliminate potential safety hazards in the manufacturing process.

The principle of anti-sway control for overhead crane

Without the crane anti-sway system, the objects suspended beneath the industrial overehad crane will swing with the operation of the trolley (or crane), and only a very experienced operator can control it to a stop with almost no swing. The anti-sway system of industrial overhead cranes can significantly improve work efficiency because there is no need to wait for the material to stop swaying and accurate positioning can be performed.

Anti-sway control employs the pendulum principle to limit the swing indefinitely by modifying the speed command signal sent to the electrical control system. The swing angle is calculated by first determining the lifting height of the hook, and then subtracting the swing angle from the given acceleration and deceleration. When the object reaches the predetermined speed or stops swinging with minimal or no swing.

Crane anti-swing structure

In order to achieve full-automatic assembly line operation in various crane transporting processes, the new generation cranes with anti-swing and automatic positioning functions have been transformed into "lifting robots." This has increased the transporting work's automation, accuracy, stability, and safety. Our crane products currently make extensive use of this technology. The "crane anti-swing control technology" has been demonstrated via practice to be accurate in preventing swinging. With great precision in swinging avoidance and control, this technology minimizes the crane load's swing amplitude by more than 95%.

Advantages of Electrical Anti-swing Cranes:

• Shorten the swing's waiting period so that the crane may function 30% more efficiently.
• Enhance crane safety and lower the possibility of worker and operational area injuries.
• Make a "crane robot" to automate material handling.
• Increase the crane's use efficiency while increasing the speed at which it may be operated safely.
• Reduce the labor intensity of employee operation, staff training time, and crane operation complexity.
• Expand the crane's safe working area.
• Increase the crane's mechanical life.
• May be used by gantry cranes and overhead cranes.
• Set up unsafe places in advance so that they can be automatically avoided by the control system.
• A vertical system that automatically changes the operating position to eliminate deviation.
• Hook pushing function, which allows the crane to run automatically while pushing the hook.

Features of anti swing control

• Reduce swing's waiting time so that work efficiency rises by 30%.
• Ensure the safety of crane operation and prevent harm to users and the environment.
• To accomplish autonomous, precise control of material handling, convert cranes into crane robots.
• Quicken the safe operation and increase the crane's productivity.
• Remote control, which makes the crane simple to use, cuts down on staff training time, and lowers worker labor intensity.
• Expand the crane's safe working area.
• Increase the crane's useful life.
• Both gantry cranes and overhead cranes can be equipped with electrical anti-swing control systems.
• Mark the hazardous area in advance so that the crane can automatically operate the system to avoid it.
• A vertical system that automatically adjusts the operating position to prevent deviation.
• The crane's ability to push the hook while running automatically in the push direction.

Comparison of overhead crane turn on & tun off anti-swing control

The control principle of the load swing is calculated according to the movement time of the swing and the lifting height, and the anti-sway system automatically corrects the back and forth swing of the heavy object under the hook through calculation. (Experimental conditions European overhead crane, load capacity: 100 tons, trolley running speed 30 m/min, crane travelling speed 40 m/min)

Stable - effectively reduce material swaying

The the advanced overhead crane with anti-sway function can solve this problem very well. In addition, the European-style crane's operating frequency conversion technology for the crane and the crane trolley can realize the micro-speed function, and the micro-speed function can realize the load control more accurately, and convert the large movement of the joystick into a slow and precise load movement. This smart feature helps the operator control the load more precisely, increasing the safety of the action.

When the anti-sway is not put into use: the shaking is serious when starting, stopping, accelerating and decelerating, the swing distance of the workpiece is about ±80cm, and it takes a long time for the workpiece to stand still. The hook cannot be hoisted normally. And it cannot be stably moved from one station to another in a short time.

When the anti-sway is put in: start, stop, acceleration, deceleration, the shaking is slight, the swing distance is ±1.5cm, and it can be hoisted and transported according to the original technical process.

Accurate - to achieve precise positioning

When the industrial crane completes the hoisting of large molds or other large and heavy goods, it is required to realize the function of jogging to realize the transportation of materials to an accurate position. the advanced overhead cranes with anti-sway function can accurately realize this function. Jogging provides a method of approaching a load's destination with high precision. Can be used for both hoisting and horizontal operation. The "Jog Range" can be preset from 2 to 100 mm. Install the anti-sway system, the system has a precise jog function, which can accurately transport the material to the exact position, when the load placement requires very precise, using this function can improve productivity and safety.

Fast - effectively improve work efficiency

Due to the continuous expansion of industrial production scale, the increasing production efficiency, and the gradual increase in the proportion of material handling costs in the production process, the demand for large-tonnage industrial cranes continues to grow. Under the requirements of large lifting capacity, high working level system and fast working speed, customers have put forward higher requirements for the reliability of cranes and the reduction of energy consumption indicators. In some industries or high-frequency cargo handling, the large swing of the station crane increases the work cycle time, cannot meet the user's high-frequency, high-paced production needs, and increases the operating cost.

• When the anti-shake is not put in: it takes about 200 seconds to precisely place the hanging object in the designated position,
• When the anti-sway is put in: place the hanging object at the designated position precisely, which can save at least 20-30% of the time.

Applications

The material handling cranes (both bridge crane and gantry crane) with electrical anti-swing control system produced can be employed in many industrial fields such as machinery processing workshops, assembly plants, waste disposal plants, steel works, power stations, shipyards, construction sites, railways, container terminals, paper making industry, metallurgy Industry, etc.

• General cranes，machinery manufacturing and transport cranes,
• Aircraft manufacturing and maintenance,hanging cranes for maintenance,
• Steel-making,casting,steel coil,rolled steel, and steel transport,
• waste recovery and garbage incineration,
• power plants,power generation,and construction of energy facilities,
• prefabricated concrete manufacturing and cement production,
• construction sites，construction pipelines, tunnels,
• Railway terminals and container yards,
• Railway vehicle manufacturing and maintenance cranes,
• Cranes for storage yards and shipyards;Paper making and transport cranes,
• Renovation of existing cranes to improve safety and productivity.